Evaporating apparatus with superposed compartments and progressive level.



G. L. PRAOHE. UPERPOSED OOMPARTMBNTS AND P ROGRESSIVE LEVEL.

BVAPORAT ING APPARATUS WITH 8 APPLICATION FILED NOV. 6, 1912.

Patented Aug. 26, 1913.

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ja /W223 G. L. PRAGHE. EVAPORATING APPARATUS WITH SUPERPOSED GOMPARTME NTS AND PROGRESSIVE LBVE APPLICATION FILED NOV. 6, 1912.

Patented Aug. 26, 1913.

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Mir/70L 0. L. PRAGHB. BVAPORATING APPARATUS WITH SUPERPOSED OOMPARTMENTS AND PROGRESSIVE LEVEL. APPLICATION FILED NOV. 6, 1912.

1,071,341 Patented Aug. 26, 1913.

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usc'ful lmprovcmcms in l 0 will whom it may couccm i; lmoum zliolzl. Ul'iARLES LOUIE; PRACIHE Ii rcoidcut of Polio, .ld mucc, curve 11 A 'liaralus Willi Supcmosccl 30m v z n l xii-iii ri'ogi'cssivc Lovclo which unpro'vc-r uicnts are fully sot fflilll iii inc icllowmg iiicrcosc llic truiismisg'iou haul; through the heating surface.

is Well known that with ull ilic tom-- .poiulum uiicl picccouic couclilions remaining the some, lilo iiiuusmissi o of lico' o iii ovu "uius cl A succd oi culuiicn the sitcom, on llic'cuc ii i oi? 'lslic boiling" liquicl sulimiticil 'lao cum oration, on tho other lmml,

Among the means usocl :lci' Spocol oi' the liquid, some arc Well known, such os'fci" instance that which consists in boiling ill-c liquid in tubes 1mm fill'iZSlCl-fi liming; a longiili relatively" to liiiull iiiuinctcr uucl iucoiiiplotcly iillcil with tho liquil "to lic conccutmucd, in such 2i that in ilxc upper portions oi'" the said cult-cs u mixiuio of steam and liquicl is fomicd, which ossuiucc a grout spec-{l of circulation anal drivco the Whole of the liquid co11- lzsiincd in tho said tulocs the said circulation looiing obtained mciely by tho cffcci: oi tlic cllscugug .f; SlBullL Expci'icncc hos shown iblic locsc lion to be given to incompletely iillcti hootiug tubes, is an inclined position close lo horizontal. Nevertheless, this ai'i'angcmciil has the drawback that the various tubes of the bundle mo filled in a, dil'lcrciit manner lliosc siiuolzcd oi; the top containing loss liquicl than those situated at the bottom. 'llhapl; fact limits in practice ill-3 i iiclzucss lhc tubular bundles to a small height and couoaqucntly limits also lll izc of tlic appw that can loo but" M ,1 boot v of ova; '11 obtainecl by boiling in an iiiciiiple'tcl y tilled lube, is obtained by keeping lJllQ level of the is concentrated to Ejl'ic slate of iLillCl" i-up mum evaporation italics pluck i1 the Jc corn alucl y lilloili By moans oi the among men; forming the subject of this invention ii; is; possible: 1 lo ootai cvopomiing boilers wi l. slightly inclinccl tubular liunfilcs, of y cl 2. To obtain iiicllioclical c i of the liquid as tho ll-uric of 710i} iucreases and ill sucli "lit the menu level of cilia liquiii i iii; compartliiglief, the,

merits oi the boiler accoicb "ill?" to invention. is ill i by Way of \"lmvnngs, in

o 1 is it longitudinal 50"011 parallel in film iubcs, Fig: 2 a, glam, and 3 a ludinul scoiion. through the cii'culzitioii cool tho discharge l-ulics,

tus co npriuos cylimliicol 0i" 1 7] OZ olicll l terminating at cool}- cool in a luoc "ola'tc $3 in which are scouirool the iuloes oi the buuiilc 3, llllQ whole 01" the said bundle being slightly iiicliiicil relzr lively to lilo horizontal. The; spacecomprised bctwcen the two tube plates, the cusing oucl the cubes, forms a chamber for the heating sli-cuiii, into which chambcr steam is udmill-cc limncli and from which the coudeusecl Water escapes through the opening 5. To the bottom tube plate io secured a receiver 6 diviclcd into a certain nunihcr oi compzii'tmcniss 8 by horizontal pciti'bions 7 :l oiming; 11-, joint with the lube pl 1c :mcl dividing i tubes of bundle inlo ccrliuiii number superposed horizontal la'ycis. The upper compurtmcnt is p. wiclcd. Wllill bruncl'z. 9 through which is iuvroduccci the liquid to bc concoct 'i'tcci each oi? the compurtmcuits is more. viilcd lulicrailly with a brunch 10 through 'v-xliicli time liquid being conccilli'n'lcd pusscs i'nccthe Fluid compartment.

of the bottom receiver.

To the upper tube plate 2 is secured an upper receiver 11 in which the liquld escaping from the tubes of the bundle, is separated from the steam wh1c h has been generated in its interior and which has carried the said liquid out of the tubes in uestion. The upper receiver itself 1s divided by curved partitions 12 into a number of compartments equal to that of the bottom receiver, in such a manner that the upper tube plate is divided by the said partitions in the same way as the bottom plate is divided by the partitions 7. The curved partitions are bent so as to form troughs 13 which occupy the whole width of the upper receiver and are closed at one end by a solid partition, while at the other end they terminate in a branch 14 which communicates with the corresponding branches 15 provided in the vertical Wall of the upper receiver. These branches establish communication between the various troughs and an equal number of outer circulation pipes 16 which thus establish communication between the compartments of the upper receiver and the corresponding compartments Each trough 13 terminates in a partition 17 raised parallel to the tube plate. Various partitions leave between them conduits 18 through which the steam separated from the liquid collected in the trough, escapes into the free space of the upper receiver, in order finally to be discharged outside through the branch 19. On each of the outer circulation pipes 16, is arranged a level regulator 20 designed in the form of an overflow which admits into the circulation tube of the compartment arranged immediately below, all the liquid escaping through the said overflow. This regulator can be constituted, as shown by Way of example in Fig. 3, by a circular branch 21 disposed vertically on the circulation tube, in the center of which branches is arranged a tube 22 also vertical, of a smaller diameter and communicating at the bottom portion by means of the pipe 23, with the circulation tube placed immediately below. The level regulator of the last bottom circulation tube is provided with a branch 24 for the escape of the concentrated liquid from the boiler.

In order to start the boiler, first of all the various compartments are filled with liquid. To that end, the liquid is admitted through the branch 9 into the upper compartment. \Vhen the liquid in the first compartment reaches the level 25 determined by the upper portion of the tube 22 forming an overflow for the level regulator 20, the liquid. escapes through the tube 22 into the circulation tube 16 of the second compartment situated immediately below, and fills that compartment up to the level 26 determined by the position of the overflow 28 of the level regulator of the said compartment. The liquid thus escapes successively into the various compartments and fills them all up to the levels 28, 29, 30 determined by the overflows of corresponding level regulators. Vhen the liquid escapes through the discharge branch 24:, all the compartments having been filled, heating steam is admitted through the branch -l, condenses around the 1 088 of the various layers of the bundle and escapes through the pipe 5 as water of condensation. Under that influence, the liquid begins to boil in all the tubes of the boiler. This boiling produces in each compartment the following circulation.

Under the influence of boiling, the liquid is projected out of each tube of the bundle, mixed with the steam generated, and passes into the upper receiver 11. Steam is separated, and discharged through the branch 19, while the liquid collects in the trough 13 in order to escape through the branch 14: (Fig. 2) into the circulation tube 19 which brings it back, through the branch 10, into the upper compartment of the bottom receiver. The same circulation is produced by boiling in each of the superposed compartments of the boiler.

The liquid to be concentrated being introduced in a continuous manner through the branch 9 into the upper compartment, it follows that a certain quantity of partly concentrated liquid, circulating in the upper compartment, tends to pass over the overflow 22 of the level regulator 20 and escape into the second compartment through the branch 23. This portion of liquid is caused to circulate in a circulation movement in the second compartment, and under the influence of such circulation a certain quantity of liquid which is being concentrated in the second compartment, passes through the corresponding overflow into the third compartment. The same thing takes place between the third and the fourth compartments, up to the last.

The concentrated liquid escaping in a continuous manner through the branch 24, it follows from this general movement of circulation from one compartment to the next that, owing to the evaporation, the density gradually increases in all the compartments, from the upper compartment where it is a minimum, to the bottom compartment where it is a maximum.

The various overflows 28, 29 etc. are adjusted so that the mean level of the boiling liquid in each compartment increases in the same Way as the concentration, so that the tubes of the upper compartments remain filled to a Very slight extent, while those of the bottom compartments are filled to a much greater extent the degree of increase of the various levels from one compartment i evrneei to the next, varying moreoverin accord concentrated.

Claims 1.. In an evaporating apparatus, the combination of an inclined shell provided with a' steam inlet and at each end with a tube plate; a bundle of tubes disposed within said shell and having their ends connected to said plates; receivers connected to the opposite ends of said shell and each divided v ance with the nature of the liquid to be horizontally into the same number of superposed compartments, one of said receivers eing provided. with a steam. exhaust and the other with an inlet for the liquid to be concentrated; a plurality of superposed, longitudinal circulation tubes located en teriorly of said shell and corresponding in number to the number of said compartments, said circulation tubes having their opposite ends communicating with the corresponding compartments, and means for continuously discharging a portion of the liquid in each circulation tube into the next lower tube 2. in an evaporating apparatus, the combination of an inclined shell provided with said shell and having their ends connected riorly of said shell and corresponding in number to the number of said compartments and having their opposite ends communicating With the corresponding compartinents; and means for continuously discharging a portion of the liquid in each circulation tube into the next lower tube embodying an upstanding discharge branch provided upon each of said tubes toward its lower end and an upstanding overflow branch disposed within the first-named branch and leading into the next lower tube.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

OHARLES LOUIS PRACHE.

Witnesses:

HANSON G. Com, EMILE Lnonn'r.

topics or? this patent may he obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. U. 

